2W21 Series Brass Direct Acting Solenoid Valve for Water and Air Flow Control
DELCO's 2W21 Series Brass Solenoid Valve features a direct acting and diaphragm structure, allowing it to start at zero pressure, making it highly reliable for low-pressure systems. It is suitable for controlling a wide range of media including air, gas, water, and oil , and offers consistent, leak-tight sealing to enhance product lifespan and overall reliability.
Size Range: DN08-DN100
Pressure Range: 0-10Bar
Thread Standard: G / BSPP / NPT
Voltage: AC/DC 12V/24V110V/220V
Selection Manual
Features
Zero-Pressure Start and High-Reliability Diaphragm Sealing
✅ Direct-Acting Mechanism (Zero Pressure Start): The direct acting design enables operation without the need for differential pressure , expanding its application range and allowing it to function reliably even at zero pressure.
✅ Enhanced Sealing and Reliability: Features a flat or diaphragm structure (Membrane Structure) that ensures consistent sealing , thereby enhancing product lifespan and overall reliability.
✅ Wide Media Compatibility: The valve is suitable for controlling various media, including Air, gas, water, and oil.
✅ Versatile Temperature Options: The solenoid offers multiple sealing materials to handle different temperature ranges: NBR for up to 80℃, EPDM for up to 100℃, and VITON for up to 120℃.
✅ Low-Pressure System Suitability: It is specifically designed for zero-pressure start , with a maximum working pressure of 1.0MPa for the 2W21 series.
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Video
Parameters
Industry Applications
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Water Treatment
Chemical dosing (chlorine, pH adjusters), filtration systems -
Chemical Processing
Acid/alkali transfer, solvent blending lines -
HVAC Systems
Chilled water control, heat recovery units -
Aquaculture
Seawater flow diversion, ozone injection -
Plating Plants
Electrolyte management, waste neutralization
Browse our case studies or talk directly with our engineers to discuss your application.
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